Large caliber rubber positive and negative flexible pipe of shield machine

Abstract

The invention discloses a large-aperture rubber positive-negative pressure hose for a shield construction machine, which comprises a gold size adhesive (1), a curtain rubber adhesive (2), a inner rubber (3), an inner cord fabric (4), a steel wire (5), a middle rubber (6), a middle cord fabric (7) and an outer rubber (8). The large-aperture rubber positive-negative pressure hose adopts the technical proposal of adopting a novel hose structure and applying corresponding adhesives to different agglutinating interfaces, so as to overcome the disadvantages that the large-aperture rubber positive-negative pressure hose for the shield construction machine produced by the prior art cannot meet the technical requirement, the hose joint is easy to fall off, and the adhesive layers of all layers of rubbers, the rubbers and terylene cord fabrics, and the cord fabrics and the steel wire are separated; the large-aperture rubber positive-negative pressure hose for the shield construction machine reaches the aim of meeting the requirements that the hose can bear the positive pressure of 15bar, without leakage, partial bubbling and permanent deformation of the pipe body, and bear the negative pressure of 0.9bar, without absorbing flatness and deformation of the pipe body; the large-aperture rubber positive-negative pressure hose does not have abnormity and damage when the bending radius is less than or equal to 2; the inner layer abrasion value is less than or equal to 1.0cm<3> per 1.61 kilometers; and the adhesive strength of the rubbers and a metal pipe joint is more than or equal to 1.5kN / m<2>.

Description

technical field [0001] The invention relates to a rubber hose, in particular to a large-diameter rubber positive and negative pressure hose for a shield machine used to discharge and suck sediment and stones for a shield machine. Background technique [0002] Shield machine, the full name of which is "shield tunnel boring machine", is a special construction machine for tunnel excavation, which is widely used in tunnel projects such as subways, railways, and highways. The excavation of the cutter head of the shield machine requires mud as a carrier for cooling, lubrication and earth and rock. The earth and rock excavated by the shield machine are mixed with the mud and transported by the mud pump through the rubber hose to separate the mud and soil outside the hole. The separated mud is passed through the rubber soft The tube is re-transported for repeated use by the shield machine. The rubber hose of the shield machine has the characteristics of super length (18m), large di...

AI Technical Summary

Problems solved by technology

[0004] The large-diameter rubber positive and negative pressure hoses of the shield machine produced by the existing technology do not meet the technical requirements, and there are problems and deficiencies such as the pipe joints are easy to fall off, and the adhesive layers of each layer of rubber, rubber and polyester cord, cord and steel wire are separated.

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